This exchange-traded fund (ETF) seeks to provide investors with a return that closely matches the performance of the short-term U.S. Treasury bill market. Specifically, it invests primarily in U.S. Treasury bills that have a remaining maturity of three months or less. This focus on very short-term government debt makes it an extremely low-risk investment, as U.S. Treasury bills are considered to be among the safest debt instruments available. The fund's strategy involves holding these bills until they mature, at which point the proceeds are reinvested into new bills, thus maintaining the short-term maturity profile of the portfolio. This approach allows investors to effectively park cash and earn a return that tracks movements in short-term interest rates. The ETF's structure and management are designed to minimize tracking error, meaning the difference between the fund's performance and the underlying benchmark is typically very small. In essence, this fund provides a straightforward and liquid way to invest in a collection of the very safest, most liquid short-term debt instruments issued by the U.S. government, making it suitable for investors seeking a cash alternative or a highly conservative component of a diversified portfolio.